A researcher is interested in using a chi-square test of independence to determine if age is independent of minutes spent reading.Age is divided into four categories while minutes spent reading is classified as high, medium, low.The number of degrees of freedom for this test is 12.

Question

Quizplus · Accepted Answer

The number of degrees of freedom for a chi-square test of independence is calculated as (r - 1) * (c - 1), where r is the number of rows and c is the number of columns in the contingency table. Here, with age divided into four categories (r = 4) and minutes spent reading divided into three categories (c = 3), the degrees of freedom would be (4 - 1) * (3 - 1) = 3 * 2 = 6.

A Researcher Is Interested in Using a Chi-Square Test of Independence